KR102000066B1 - Dishwasher and method of controlling the same - Google Patents

Abstract

The present invention relates to a dishwasher.
A dishwasher according to an embodiment of the present invention includes: a tub forming a space in which a tableware is washed; A sump for collecting wash water sprayed on the tub; A motor driven to inject wash water supplied to the sump into the turbine; A circulation pipe through which the wash water supplied from the motor flows; A tank connected to the circulation pipe to receive and store wash water flowing in the circulation pipe and having a storage space outside the tub; And a controller for intermittently driving the motor to raise the level of the wash water stored in the tank stepwise.

Description

[0001] Dishwasher and method of controlling same [0002]

The present invention relates to a dishwasher, and more particularly, to a dishwasher for efficiently storing washing water collected in a sump.

The dishwasher is a household appliance that cleans food waste on the surface of a dish by high-pressure washing water sprayed from the washing arm. The dishwasher generally comprises a tub forming a washing chamber and a sump mounted on the bottom of the tub to store washing water. Then, the washing water is moved to the washing arm by the pumping action of the pump mounted inside the sump, and the washing water moved to the washing arm is injected at a high pressure through the jet opening formed in the washing arm. Then, the washing water sprayed at a high pressure hits the surface of the utensil so that dirt such as food waste remaining on the utensil falls to the bottom of the tub. The used washing water is separated from the dirt, then collected by the sump and discharged to the outside.

However, in the prior art, the method of using and discharging the washing water once was adopted, and the use of the excessive washing water became a problem. Therefore, it is necessary to search for a method of recycling the washing water in order to minimize the use of the washing water.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dishwasher capable of saving washing water required for washing and a control method thereof.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a dishwasher including: a tub forming a space in which a tableware is washed; A sump for collecting wash water sprayed on the tub; A motor driven to inject wash water supplied to the sump into the turbine; A circulation pipe through which the wash water supplied from the motor flows; A tank connected to the circulation pipe to receive and store wash water flowing in the circulation pipe and having a storage space outside the tub; And a controller for intermittently driving the motor to raise the level of the wash water stored in the tank stepwise.

A control method of a dishwasher according to an embodiment of the present invention includes a sump to collect washing water sprayed to the tub and the tub, a motor to spray washing water supplied to the sump to the sump, A control method for a dishwasher including a circulation pipe through which wash water flows, the control method comprising: driving a motor to cause wash water to flow into a tank connected to the circulation pipe and storing a wash water, An initial storage step of opening a regulating valve for interrupting the washing water; A collecting waiting step of stopping the motor and closing the regulating valve during a collecting standby period in which the washing water injected into the turbine is collected by the sump while driving the motor, And an additional storing step of driving the motor and opening the regulating valve so that the washing water collected in the sump flows to the tank and is further stored when the collecting waiting step is finished.

The details of other embodiments are included in the detailed description and drawings.

According to the dishwasher and its control method of the present invention, one or more of the following effects can be obtained.

First, the used washing water can be stored and reused when needed, thereby reducing the amount of washing water consumed.

Second, there is an advantage that the energy required for heating the washing water can be saved by storing the washing water at room temperature.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 shows the arrangement of a tank and peripheral components according to an embodiment of the present invention.
2 is a sectional view of a dishwasher according to an embodiment of the present invention.
3 is a perspective view showing a rotary plate of a flow path switching unit according to an embodiment of the present invention.
FIG. 4 is a block diagram schematically illustrating a flow path of washing water in a dishwasher according to an embodiment of the present invention.
5 is a block diagram illustrating a control unit and a peripheral configuration according to an embodiment of the present invention.
6 is a time-sequential representation of the operation of the dishwasher according to an embodiment of the present invention.
7 is a flowchart illustrating a method of controlling a dishwasher according to an embodiment of the present invention.
FIG. 8 is a flowchart showing the initial storage step of the control method of the dish washer shown in FIG. 7 in detail.
FIG. 9 is a detailed flowchart of the additional storing step of the control method of the dishwasher shown in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a method of controlling a dishwasher and a dishwasher according to embodiments of the present invention.

2 is a sectional view of a dishwasher 1 according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the dishwasher 1 according to an embodiment of the present invention. 4 is a block diagram schematically showing a flow path of washing water in the dishwasher 1 according to an embodiment of the present invention. The solid line indicates the flow path of the washing water, The dashed line represents the flow path through which the washing water is stored in the tank 100 and the one-dot chain line represents the flow path through which the washing water is discharged from the tank 100 so that the washing water can be reused, 5 is a block diagram illustrating a control unit and a peripheral configuration according to an embodiment of the present invention.

1 to 5, a dishwasher 1 according to an embodiment of the present invention includes a tub 10 forming a space in which a dishware is washed; A sump in which wash water injected into the tub 10 is collected; A motor 47 driven to spray wash water supplied to the sump to the tub 10; A circulation pipe 30 through which the wash water supplied from the motor 47 flows; A tank 100 connected to the circulation pipe 30 so that the washing water flowing in the circulation pipe 30 flows and stored therein and has a storage space outside the tub 10; And a controller 200 for intermittently driving the motor 47 so as to gradually raise the level of the washing water stored in the tank 100.

The cabinet 2 forms the appearance of the dishwasher 1 and provides a frame in which the components are received. The cabinet 2 is open at the front. The cabinet 2 is provided with a tub 10 through which washing water is sprayed. The tub 10 is formed with a space in which the dishes are washed. The door (3) opens and closes the front surface of the cabinet (2). The door (3) seals the tub (10). The door (3) is rotatably coupled to the front surface of the cabinet (2). The tub (10) is provided inside the cabinet (2). The tub (10) is hermetically sealed by the door (3).

The washing water is sprayed into the tub 10. A washing arm (20) for spraying washing water is provided in the tub (10). Inside the tub 10, there is provided a rack for receiving dishes. The rack is installed in the tub 10 so as to be movable forward and backward. It is preferable that a plurality of racks are provided. The rack includes an upper rack (11) and a lower rack (13). The washing water injected into the tub 10 is collected by the sump 60. The filter assembly 50 filters foreign substances contained in the washing water.

The drain pipe (71) is connected to the sump (60). The drain pipe 71 discharges the washing water collected in the sump 60 to the outside. The drain pipe 71 may be connected to the sewer pipe. The sump 60 collects washing water. The sump 60 collects wash water through an external supply pipe. The sump 60 collects washing water injected into the tub 10. The sump 60 is connected to the circulating pipe 30 through which the collected wash water is supplied to the washing arm 20. [ The sump 60 is provided on the lower side of the tub 10. The sump 60 is provided with a filter assembly 50 for filtering foreign substances contained in the washing water.

In the tank 100, the washing water collected in the sump 60 flows and is stored. The tank 100 drains the stored wash water back to the sump 60. The tank 100 may be connected to the tank connecting pipe 150. The tank connecting pipe 150 is a pipe provided between the tank 100 and the sump 60 for flowing wash water. The tank connection pipe 150 may be connected to at least one of the circulation pipes 30. [ The pump 45 pressurizes the washing water collected in the sump 60 to flow into the circulation pipe 30. A motor 47 is provided inside the pump 45. The motor 47 rotates to transport the washing water to the circulation pipe 30. The circulation pipe (30) is connected to the cleaning arm (20).

The washing water sprayed from the washing arm 20 cleans the dishes. The washing water sprayed from the washing arm (20) is sprayed onto the tub (10). The washing water injected from the washing arm 20 is collected by the sump 60. The circulation pipe (30) is connected to the pump (45). It is preferable that a plurality of cleaning arms 20 are provided for each height.

In one embodiment, the cleaning arm 20 includes an upper arm 21 located at the highest position, a lower arm 25 located at the lowest position, and a middle arm 23 disposed between the upper arm 21 and the lower arm 25 ). The circulation pipe 30 may include a first circulation pipe 31, a second circulation pipe 33, and a third circulation pipe 35. The upper arm 21 receives the washing water from the pump 45 through the first circulation pipe 31. The middle arm 23 receives the washing water from the pump 45 through the second circulation pipe 33. The lower arm 25 receives the washing water from the pump 45 through the third circulation pipe 35. The washing water discharged from the pump 45 may be flowed to at least one of the plurality of circulation pipes 30 by the flow path switching portion 320. Preferably, the tank connecting pipe 150 is connected to the first circulating pipe 31. The wash water flowing into the first circulation pipe may be injected into the tub 10 through the upper arm or may be stored in the tank 100 through the tank connecting pipe 150.

The flow path switching unit 320 includes a flow path switching motor 321 for generating a rotational force and a rotating plate 323 for rotating the flow of washing water by the flow path switching motor 321. The rotary plate 323 selectively opens and closes a plurality of connection ports (not shown) formed at the positions where the plurality of cleaning arms 20 are branched. The rotation plate 323 has a plurality of switching holes 325a and 325b. The plurality of switching holes 325a and 325b include a first switching hole 325a formed to be long in the circumferential direction and a second switching hole 325b formed in a circular shape. The rotary plate 323 is rotated stepwise by the flow path switching motor 321. [ When the rotary plate 323 is rotated by the flow path switching motor 321, a plurality of switching holes 325a and 325b formed in the rotary plate 323 are located at positions corresponding to at least one of the plurality of connection ports, So that the flowing wash water is sprayed toward at least one of the plurality of circulation pipes (30).

The flow-path switching motor 321 generates a rotating force to rotate the rotating plate 323 step by step. It is preferable that the flow path switching motor 321 is a step motor that advances by a certain angle every time the excitation state is changed by the input pulse signal and stops by maintaining a constant position when the excitation state is not changed. The control unit 200 adjusts the flow path switching motor 321. The control unit 200 drives the flow path switching motor 321 to adjust the position of the rotary plate 323.

 The control unit 200 controls the flow path switching motor 321 so that the wash water discharged from the pump 45 flows into the first circulation pipe 31 when the initial storing step S100 to the additional storing step S300 is reached do. The dishwasher (1) includes a controller (200). The control unit 200 performs at least one or more strokes. The stroke may include a wash stroke, a rinse stroke, a drying stroke and a storage stroke.

The control unit 200 may be connected to a motor 47, a control valve 153, a flow path switching motor 321, and an input unit 210 to which user's requirements are input. The control unit 200 may include a central processing unit 180 and a memory 170. The memory 170 stores data and programs related to various strokes. The memory 170 may store the motor driving time and the like related to the method of storing the washing water to be described later. The central processing unit 180 performs various strokes by data and programs related to the memory 170. [

The controller 200 may further include a timer 160. The timer 160 can measure the execution time of various strokes. For example, the timer 160 measures the opening / closing time of various valves, the driving time of various motors, and the start and end times of various strokes. The central processing unit 180 receives information from the timer 160 and drives and stops the respective devices at a predetermined time. The input unit 210 may include at least one device through which a user can input information, such as a dial, a lever, a button, and a switch.

The water supply pipe 41 is connected to the water supply provided in the home. The washing water is introduced through the water supply pipe (41). The wash water is collected by the sump 60. The pump 45 causes the washing water collected in the sump 60 to flow to the circulation pipe 30. The washing water flowing through the circulation pipe 30 is discharged to the tub 10 through the washing arm 20. [

The tank connecting pipe 150 is connected to any one of the circulating pipes 30. Preferably, the tank connecting pipe 150 is connected to the first circulating pipe 31. When the wash water is stored, the control valve 150 is opened and the wash water is stored in the tank 100 via the reuse pipe 150. On the other hand, when the stored wash water is used, the control unit opens the control valve 150 to collect the wash water into the sump 60 for recycling. When the washing water collected in the sump 60 is discharged to the outside, the washing water flows through the drain pipe 71 and is discharged to the sewer.

The dishwasher 1 according to an embodiment of the present invention further includes a control valve 153 for interrupting washing water flowing through the tank 100 and the circulation pipe 30. The control valve 153 regulates opening and closing of the tank connecting pipe 150. The control valve 153 receives an instruction from the control unit 200. The control valve 153 interrupts the wash water stored in the tank 100. When the control valve 153 is opened, the washing water stored in the tank 100 is discharged to the circulation pipe 30. The tank 100 may be mounted on the tank connecting pipe 150 or on a portion where the tank connecting pipe 150 and the tank 100 are connected.

6 is a time-sequential representation of the operation of the dishwasher according to an embodiment of the present invention. 6, when the washing water is stored in the initial state without the washing water stored in the tank 100, the controller 200 controls the opening / closing of the adjusting valve 153 before the motor 47 is driven do.

The tank 100 stores wash water. The initial state refers to an empty state in which there is no wash water stored in the tank 100. When the motor 47 is driven and the control valve 153 is opened, the washing water flows into the tank 100 from the circulation pipe 30. The control unit 200 can also open the control valve 153 after driving the motor 47 in the initial state. Preferably, the control valve 153 is opened and the motor 47 is driven. The noise generated when washing water is bumped against the control valve 153 when the motor 47 is driven after driving the control valve 153 in the initial state can be reduced.

The control unit 200 can instruct the motor 47 to be driven when the initial waiting period t0 to t1 elapses after the control valve 153 is opened. The initial waiting period t0 to t1 is a period of time from when the control valve 153 is opened in the initial state to when the motor 47 is driven in the initial state. The initial storage step S100 may include an initial opening period t0 to t2. The initial storage step S100 may include an initial waiting period t0 to t1 and an initial pumping period t1 to t2. In the initial state, the opening timing of the regulating valve 153 is the timing of the initial opening step, and the closing timing of the regulating valve 153 is the ending point of the initial opening step.

In the embodiment of the present invention, the time required for the initial storage step (SlOO) is 45 seconds. The initial opening period t0 to t2 is a period for opening the flow path of the tank connecting pipe 150 connecting the tank 100 and the circulating pipe 30 in the initial state. The time point of the initial opening period t0 to t2 is when the regulating valve 153 is opened in the initial state in which the tank 100 is empty. The end point of the initial opening period (t0 to t2) may be the same as the point of time of the catchment waiting period (t2 to t3). The end point of the initial opening period t0 to t2 may be the same as the end point of the initial pumping period t1 to t2. The end point of the initial opening period t0 to t2 may be the same as the end point of the initial velocity maintaining period.

In the embodiment of the present invention, the time required for the initial opening period t0 to t2 is 45 seconds. The initial waiting period t0 to t1 is a period of time required to open the control valve 153 and to drive the motor 47. [ The starting point of the initial waiting period t0 to t1 may be the same as the starting point of the initial opening period t0 to t2. The end point of the initial waiting period t0 to t1 may be the same as the starting point of the initial pumping period t1 to t2. In the embodiment of the present invention, the time required for the initial waiting period (t0 to t1) is 5 seconds.

The initial pumping period t1 to t2 is a period for driving the motor 47 to flow wash water from the sump 60 to the tank 100. [ The initial pumping period t1 to t2 is a period for driving the motor 47 so that the washing water is stored in the tank 100. [ The time point of the initial pumping period t1 to t2 is the same as the end point of the initial waiting period. The initial pumping periods t1 to t2 arrive after a predetermined time has elapsed from the start of the initial opening period t0 to t2.

The end point of the initial pumping period (t1 to t2) may be the same as the point of time of the catchment waiting step (S200). The end point of the initial pumping period t1 to t2 may be the same as the end point of the initial opening period t0 to t2. The end point of the initial pumping period t1 to t2 may be the same as the initial velocity maintaining period. In the embodiment of the present invention, the time required for the initial pumping period t1 to t2 is 40 seconds.

The start point of the initial pumping period t1 to t2 comes about 5 seconds after the regulating valve 153 is opened and the end point of the initial pumping period t1 to t2 is the start point of the regulating valve 153, Lt; RTI ID = 0.0 > 45 seconds. ≪ / RTI > The initial arrival period is a period in which the motor 47 is driven to reach a predetermined supply rpm in the initial state. The initial speed maintenance period is a period in which the motor 47 is driven while maintaining the predetermined supply rpm in the initial state. The supply rpm can be the number of revolutions of the motor 47 driven to such an extent that the wash water is sprayed to the tub 10 through the wash arm 20 and the wash water is stored in the tank 100 at the same time.

The time point of the initial arrival period may be the same as the time point of the initial pumping period (t1 to t2). The end point of the initial arrival time is when a predetermined supply rpm is reached. In one embodiment of the present invention, the time required for the initial arrival is 3 seconds. The starting point of the initial speed maintenance period may be the same as the end point of the initial arrival period. The end point of the initial speed maintenance period may be the same as the initial pumping period t1 to t2. In one embodiment of the present invention, the time required for the initial speed maintenance period may be 37 seconds.

The control unit 200 according to an embodiment of the present invention may be configured such that when the washing water is additionally stored in the tank 100 while the washing water is stored in the tank 100, the predetermined arrival time t3 to t4 after the motor 47 is driven, (47) reaches the predetermined supply RPM, the control valve (153) is opened. The additional storage step S300 may include an additional opening period (t4 to t5). The additional storage step S300 may include an additional pumping period t3 to t5. The additional storage step S300 may include an additional arrival period t3 to t4 and an additional speed maintenance period t4 to t5.

In the embodiment of the present invention, the time required for the additional storing step (S300) is 7 seconds. On the other hand, the additional storage step S300 may be repeated n times. Preferably, the additional storing step S300 is repeated five times. The additional storing step (S300) is performed alternately with the catching waiting step (S200).

The additional opening period (t4 to t5) is a period for opening the flow path of the tank connecting pipe (150) so as to additionally store the washing water in the tank (100). When the initial storage step S100 is finished, the tank 100 has wash water. The control unit 200 can control the regulating valve 153 and the motor 47 in a manner different from the initial step so as to additionally store the washing water while maintaining the capacity of the already stored washing water.

The time point of the additional opening period (t4 to t5) may be the same as the end point of the additional arrival period (t3 to t4). The time of the additional opening period (t4 to t5) is later than the time of the additional pumping period (t3 to t5). The opening of the regulating valve 153 is performed during the additional pumping period t3 to t5. It is preferable that the time of the additional opening period t4 to t5 is opened when the motor 47 is being driven so that the washing water stored in the tank 100 does not flow to the circulation pipe 30 even if the control valve 153 is opened Do. In the embodiment of the present invention, the time point of the additional opening period (t4 to t5) is when the motor 47 reaches 1200 rpm and / or when three seconds have elapsed after the elapse of the additional pumping period (t3 to t5) and / It is the time when the additional arrival time (t3 to t4) has elapsed. The end point of the additional opening period (t4 to t5) may be the same as the end point of the additional pumping period (t3 to t5) and / or the end point of the additional velocity holding period (t4 to t5).

Since the additional storing step (S300) is repeated a plurality of times, the additional opening period (t4 to t5) is repeated a plurality of times. In the embodiment of the present invention, the additional opening period (t4 to t5) is repeated five times, and the time required for the additional opening period (t4 to t5) is four seconds. The additional opening periods t4 to t5 come alternately with the catchment waiting periods t2 to t3.

The additional pumping period t3 to t5 is a period for driving the motor 47 to additionally store wash water in the tank 100. [ The additional pumping periods t3 to t5 are periods in which the motor 47 is temporarily driven to raise the wash water stored in the tank 100 stepwise. The time of the additional pumping period (t3 to t5) may be the same as the end point of the catchment waiting period (t2 to t3). The end point of the additional pumping period (t3 to t5) may be the same as the end point of the additional opening period (t4 to t5).

In an embodiment of the present invention, according to one embodiment of the present invention, the time required for the additional pumping period (t3 to t5) is 7 seconds. The additional pumping periods t3 to t5 can be repeated n times and the additional pumping periods t3 to t5 alternate with the catchment waiting periods t2 to t3. In an embodiment of the present invention, the timing of the additional pumping period t3 to t5 may be reached again after 8 seconds have passed since the motor 47 stopped. The time point of the additional arrival time t3 to t4 may be the same as the end point of the catchment waiting period t2 to t3. The end point of the additional arrival period (t3 to t4) may be the same as the starting point of the additional opening period (t4 to t5).

In the embodiment of the present invention, the time required for the additional arrival times t3 to t4 may be 3 seconds. The additional arrival periods t3 to t4 can be repeated n times and the additional arrival periods t3 to t4 and the additional rate maintenance periods t4 to t5 can be alternately arranged with the catchment waiting periods t2 to t3 To come.

The additional arrival times t3 to t4 are periods in which the motor 47 is driven to reach a predetermined supply rpm. The additional speed maintenance periods t4 to t5 are periods in which the motor 47 is driven while maintaining a predetermined supply rpm. The supply rpm may be the number of revolutions of the motor 47 driven to such an extent that the wash water stored in the tank 100 is not discharged to the circulation pipe 30. The supply rpm can be the number of revolutions of the motor 47 driven to such an extent that the wash water is sprayed to the tub 10 through the wash arm 20 and the wash water is stored in the tank 100 at the same time.

The time point of the additional speed maintenance period (t4 to t5) may be the same as the additional opening period (t4 to t5). The end points of the additional speed maintenance periods t4 to t5 may be the same as the additional pumping periods t3 to t5 and / or the additional opening periods t4 to t5. In the embodiment of the present invention, the time required for the additional speed maintenance period (t4 to t5) is 4 seconds. The additional speed maintenance periods t4 to t5 can be repeated n times and the additional arrival time periods t3 to t4 and the additional speed maintenance periods t4 to t5 can be alternated with the catchment waiting periods t2 to t3, .

The controller 200 according to the embodiment of the present invention closes the control valve 153 when the motor 47 is stopped. The control unit 200 may stop the motor 47 after closing the control valve 153. [ The control unit 200 may simultaneously instruct the closing of the control valve 153 and the stop of the motor 47. [ Preferably, the control unit 200 closes the regulating valve 153 before the wash water stored in the tank 100 is discharged. The closing of the control valve 153 and the stopping of the motor 47 are performed at the end of the initial storage step S100. The closing of the regulating valve 153 and the stopping of the motor 47 are performed at the same time as the start of the catchment waiting step S200.

The control unit 200 drives the motor 47 during a predetermined initial pumping period t1 to t2 when the washing water is stored in the initial state without the washing water stored in the tank 100 and when the washing water is stored in the tank 100 When the washing water is additionally stored, the motor 47 is driven for a predetermined additional pumping period t3 to t5. The initial pumping period t1 to t2 is a period for driving the motor 47 so that the washing water is stored in the tank 100. [

The time point of the initial pumping period t1 to t2 is the same as the end point of the initial waiting period t0 to t1. The initial pumping periods t1 to t2 arrive after a predetermined time has elapsed from the start of the initial opening period t0 to t2. The end point of the initial pumping period (t1 to t2) may be the same as the point of time of the catchment waiting step (S200). The end point of the initial pumping period t1 to t2 may be the same as the end point of the initial opening period t0 to t2. The end point of the initial pumping period t1 to t2 may be the same as the initial velocity maintaining period. In the embodiment of the present invention, the time required for the initial pumping period t1 to t2 is 40 seconds. The start point of the initial pumping period t1 to t2 comes about 5 seconds after the regulating valve 153 is opened and the end point of the initial pumping period t1 to t2 is the start point of the regulating valve 153, Lt; RTI ID = 0.0 > 45 seconds. ≪ / RTI >

The additional pumping period t3 to t5 is a period for driving the motor 47 to additionally store wash water in the tank 100. [ The additional pumping periods t3 to t5 are periods in which the motor 47 is temporarily driven to raise the wash water stored in the tank 100 stepwise. The time of the additional pumping period (t3 to t5) may be the same as the end point of the catchment waiting period (t2 to t3). The end point of the additional pumping period (t3 to t5) may be the same as the end point of the additional opening period (t4 to t5).

The control unit 200 according to the embodiment of the present invention drives the motor 47 such that the additional pumping period t3 to t5 is repeated a plurality of times when the initial pumping period t1 to t2 elapses. The additional pumping periods t3 to t5 can be repeated n times and the additional pumping periods t3 to t5 alternate with the catchment waiting periods t2 to t3.

 According to one embodiment of the present invention, the time required for the additional pumping period (t3 to t5) is 7 seconds. Further, the time point of the additional pumping period (t3 to t5) can be reached again after elapse of 8 seconds after the motor 47 stops. The initial pumping period t1 to t2 according to an embodiment of the present invention is set longer than the additional pumping period t3 to t5. The additional pumping period and the time required for the initial pumping period t1 to t2 may be differently set according to the size of the tank 100 and the output of the motor 47. [ In the embodiment of the present invention, the initial pumping period t1 to t2 may take 40 seconds, and the additional pumping period t3 to t5 may take 7 seconds.

The controller 200 controls the motor 47 during the predetermined waiting time period t2 to t3 so that the washing water sprayed to the tub 10 during the operation of the motor 47 is collected by the sump 60. [ ). The catchment waiting step S200 may include a catchment waiting period t2 to t3.

In the embodiment of the present invention, the time required for the catchment waiting step (S200) is 8 seconds. Meanwhile, the water collecting standby step (S200) may be repeated n times. Preferably, the catchment waiting step S200 is repeated five times. The water collecting standby step (S200) is performed alternately with the additional storing step (S300). The collecting waiting period (t2 to t3) is a period of waiting for the washing water existing in the tub (10) or the washing arm (20) to be collected by the sump. The collecting waiting period t2 to t3 is a period of waiting for the wash water injected into the tub 10 to be collected into the sump during the initial storage step S100 or the additional storing step S300 performed previously.

Preferably, the motor 47 is stopped during the collection waiting period (t2 to t3).

Further, the control valve 153 closes the flow path of the tank connecting pipe 150 so that the stored washing water is not discharged during the waiting period t2 to t3. The time point of the collecting standby period t2 to t3 may be the same as the end point of the initial open period t0 to t2 and / or the end point of the initial pumping period t1 to t2 and / or the initial velocity sustain period. The end point of the collecting standby period (t2 to t3) may be the same as the starting point of the additional pumping period (t3 to t5).

The controller 200 controls the motor 47 so that the motor 47 is driven and the collecting standby period t2 to t3 is repeated a plurality of times when the collecting waiting period t2 to t3 is finished. do. In the embodiment of the present invention, the time required for the catchment waiting period (t2 to t3) is 8 seconds. Meanwhile, the catchment waiting period (t2 to t3) may be repeated n times. The collecting standby period (t2 to t3) is performed alternately with the additional pumping period (t3 to t5). In the embodiment of the present invention, the catchment waiting period (t2 to t3) may be repeated five times. In the embodiment of the present invention, the time of the catchment waiting period (t2 to t3) can be reached when 7 seconds or 40 seconds have elapsed since the start of the driving of the motor 47. [

FIG. 7 is a flowchart showing a control method of the dishwasher according to an embodiment of the present invention, FIG. 8 is a flowchart showing details of an initial storage step (S100) of the control method of the dishwasher shown in FIG. 7, 7 is a flowchart showing in detail the additional storage step (S300) of the control method of the dishwasher shown in FIG.

7 to 9, a control method of the dishwasher 1 according to an embodiment of the present invention includes a method of controlling the washing water supplied to the sump and the sump in which the washing water sprayed to the tub 10 and the tub 10 is collected, A control method for a dishwasher (1) comprising a motor (47) driven to spray on a tub (10) and a circulation pipe (30) through which wash water supplied from a motor (47) flows, A control valve 153 for driving the motor 47 to flow wash water to the tank 100 having the storage space for storing the wash water and for controlling the wash water flowing between the circulation pipe 30 and the tank 100 (S100); A water collecting waiting step (step S26) for stopping the motor 47 and closing the regulating valve 153 during the collecting waiting period t2 to t3 so that the washing water injected to the tub 10 during the driving of the motor 47 is collected by the sump S200); And an additional storing step S300 of driving the motor 47 and opening the regulating valve 153 so that the washing water collected in the sump flows to the tank 100 and is further stored when the collecting waiting step S200 is finished do.

The initial storage step S100 may include an initial opening period t0 to t2. The initial storage step S100 may include an initial waiting period t0 to t1 and an initial pumping period t1 to t2. In the embodiment of the present invention, the time required for the initial storage step (SlOO) is 45 seconds. The initial opening period t0 to t2 is a period for opening the flow path of the tank connecting pipe 150 connecting the tank 100 and the circulating pipe 30 in the initial state. The catchment waiting step S200 may include a catchment waiting period t2 to t3. In the embodiment of the present invention, the time required for the catchment waiting step (S200) is 8 seconds. Meanwhile, the water collecting standby step (S200) may be repeated n times. Preferably, the catchment waiting step S200 is repeated five times. The water collecting standby step (S200) is performed alternately with the additional storing step (S300).

The collecting waiting period (t2 to t3) is a period of waiting for the washing water existing in the tub (10) or the washing arm (20) to be collected by the sump. Preferably, the motor 47 is stopped during the collection waiting period (t2 to t3). Further, the control valve 153 closes the flow path of the tank connecting pipe 150 so that the stored washing water is not discharged during the waiting period t2 to t3.

The time point of the collecting standby period t2 to t3 may be the same as the end point of the initial open period t0 to t2 and / or the end point of the initial pumping period t1 to t2 and / or the initial velocity sustain period. The end point of the collecting standby period (t2 to t3) may be the same as the starting point of the additional pumping period (t3 to t5). The additional storage step S300 may include an additional opening period (t4 to t5). The additional storage step S300 may include an additional pumping period t3 to t5. The additional storage step S300 may include an additional arrival period t3 to t4 and an additional speed maintenance period t4 to t5.

The additional opening period (t4 to t5) is a period for opening the flow path of the tank connecting pipe (150) so as to additionally store the washing water in the tank (100). When the initial storage step S100 is finished, the tank 100 has wash water. The control unit 200 can control the regulating valve 153 and the motor 47 in a manner different from the initial step so as to additionally store the washing water while maintaining the capacity of the already stored washing water.

The catching waiting step S200 and the additional storing step S300 according to an embodiment of the present invention are repeated a plurality of times after the end of the initial storing step S100. The additional storage step (S300) may be repeated n times. In the embodiment of the present invention, the time required for the additional storing step (S300) is 7 seconds, and the additional storing step (S300) is repeated five times. The additional storing step (S300) is performed alternately with the catching waiting step (S200). The additional storage step (S300) is performed for a total of 35 seconds.

The initial storage step S100 according to an embodiment of the present invention may include a step S100 of storing the predetermined timing for opening the regulating valve 153, It comes first.

The time point of the initial opening period t0 to t2 is when the regulating valve 153 is opened in the initial state in which the tank 100 is empty. In the initial state, the opening timing of the regulating valve 153 is the timing of the initial opening step, and the closing timing of the regulating valve 153 is the ending point of the initial opening step. The end point of the initial opening period (t0 to t2) may be the same as the point of time of the catchment waiting period (t2 to t3). The end point of the initial opening period t0 to t2 may be the same as the end point of the initial pumping period t1 to t2. The end point of the initial opening period t0 to t2 may be the same as the end point of the initial velocity maintaining period. In the embodiment of the present invention, the time required for the initial opening period t0 to t2 is 45 seconds.

The initial waiting period t0 to t1 is a period of time required to open the control valve 153 and to drive the motor 47. [ The starting point of the initial waiting period t0 to t1 may be the same as the starting point of the initial opening period t0 to t2. The end point of the initial waiting period t0 to t1 may be the same as the starting point of the initial pumping period t1 to t2. In the embodiment of the present invention, the time required for the initial waiting period (t0 to t1) is 5 seconds.

The initial pumping period t1 to t2 is a period for driving the motor 47 to flow wash water from the sump 60 to the tank 100. [ The initial pumping period t1 to t2 is a period for driving the motor 47 so that the washing water is stored in the tank 100. [ The time point of the initial pumping period t1 to t2 is the same as the end point of the initial waiting period t0 to t1. The initial pumping periods t1 to t2 arrive after a predetermined time has elapsed from the start of the initial opening period t0 to t2. The end point of the initial pumping period (t1 to t2) may be the same as the point of time of the catchment waiting step (S200). The end point of the initial pumping period t1 to t2 may be the same as the end point of the initial opening period t0 to t2. The end point of the initial pumping period t1 to t2 may be the same as the initial velocity maintaining period. In the embodiment of the present invention, the time required for the initial pumping period t1 to t2 is 40 seconds.

The start point of the initial pumping period t1 to t2 comes about 5 seconds after the regulating valve 153 is opened and the end point of the initial pumping period t1 to t2 is the start point of the regulating valve 153, Lt; RTI ID = 0.0 > 45 seconds. ≪ / RTI >

The initial arrival period is a period in which the motor 47 is driven to reach a predetermined supply rpm in the initial state. The initial speed maintenance period is a period in which the motor 47 is driven while maintaining the predetermined supply rpm in the initial state. The supply rpm can be the number of revolutions of the motor 47 driven to such an extent that the wash water is sprayed to the tub 10 through the wash arm 20 and the wash water is stored in the tank 100 at the same time.

The time point of the initial arrival period may be the same as the time point of the initial pumping period (t1 to t2). The end point of the initial arrival time is when a predetermined supply rpm is reached. In one embodiment of the present invention, the time required for the initial arrival is 3 seconds. The starting point of the initial speed maintenance period may be the same as the end point of the initial arrival period. The end point of the initial speed maintenance period may be the same as the initial pumping period t1 to t2. In one embodiment of the present invention, the time required for the initial speed maintenance period may be 37 seconds. The sum of the initial arrival period and the initial velocity maintenance period may be the same as the initial pumping period (t1 to t2).

The additional storing step S300 according to an embodiment of the present invention may include a step S300 of storing additional information such that the driving point of the motor 47 predetermined to drive the pump 45 opens the regulating valve 153, It comes first. The time point of the additional opening period t4 to t5 is the opening timing of the control valve 153 and the end point of the additional opening period t4 to t5 is the closing timing of the control valve 153. [

The time point of the additional opening period (t4 to t5) may be the same as the end point of the additional arrival period (t3 to t4). The time of the additional opening period (t4 to t5) is later than the time of the additional pumping period (t3 to t5). The opening of the regulating valve 153 is performed during the additional pumping period t3 to t5. It is preferable that the time of the additional opening period t4 to t5 is opened when the motor 47 is being driven so that the washing water stored in the tank 100 does not flow to the circulation pipe 30 even if the control valve 153 is opened Do. In the embodiment of the present invention, the time point of the additional opening period (t4 to t5) is when the motor 47 reaches 1200 rpm and / or when three seconds have elapsed after the elapse of the additional pumping period (t3 to t5) and / It is the time when the additional arrival time (t3 to t4) has elapsed.

The end point of the additional opening period (t4 to t5) may be the same as the end point of the additional pumping period (t3 to t5) and / or the end point of the additional velocity holding period (t4 to t5). Since the additional storing step (S300) is repeated a plurality of times, the additional opening period (t4 to t5) is repeated a plurality of times. In the embodiment of the present invention, the additional opening period (t4 to t5) is repeated five times, and the time required for the additional opening period (t4 to t5) is four seconds. The additional opening periods t4 to t5 come alternately with the catchment waiting periods t2 to t3.

The additional pumping period t3 to t5 is a period for driving the motor 47 to additionally store wash water in the tank 100. [ The additional pumping periods t3 to t5 are periods in which the motor 47 is temporarily driven to raise the wash water stored in the tank 100 stepwise. The time of the additional pumping period (t3 to t5) may be the same as the end point of the catchment waiting period (t2 to t3). The end point of the additional pumping period (t3 to t5) may be the same as the end point of the additional opening period (t4 to t5). According to one embodiment of the present invention, the time required for the additional pumping period (t3 to t5) is 7 seconds. The additional pumping periods t3 to t5 can be repeated n times and the additional pumping periods t3 to t5 alternate with the catchment waiting periods t2 to t3. In an embodiment of the present invention, the timing of the additional pumping period t3 to t5 may be reached again after 8 seconds have passed since the motor 47 stopped.

The time point of the additional arrival time t3 to t4 may be the same as the end point of the catchment waiting period t2 to t3. The end point of the additional arrival period (t3 to t4) may be the same as the starting point of the additional opening period (t4 to t5). In the embodiment of the present invention, the time required for the additional arrival times t3 to t4 may be 3 seconds. The additional arrival periods t3 to t4 can be repeated n times and the additional arrival periods t3 to t4 and the additional rate maintenance periods t4 to t5 can be alternately arranged with the catchment waiting periods t2 to t3 To come.

The additional arrival times t3 to t4 are periods in which the motor 47 is driven to reach a predetermined supply rpm. The additional speed maintenance periods t4 to t5 are periods in which the motor 47 is driven while maintaining a predetermined supply rpm. The supply rpm may be the number of revolutions of the motor 47 driven to such an extent that the wash water stored in the tank 100 is not discharged to the circulation pipe 30.

The supply rpm can be the number of revolutions of the motor 47 driven to such an extent that the wash water is sprayed to the tub 10 through the wash arm 20 and the wash water is stored in the tank 100 at the same time. The time point of the additional speed maintenance period (t4 to t5) may be the same as the additional opening period (t4 to t5). The end points of the additional speed maintenance periods t4 to t5 may be the same as the additional pumping periods t3 to t5 and / or the additional opening periods t4 to t5.

In the embodiment of the present invention, the time required for the additional speed maintenance period (t4 to t5) is 4 seconds. The additional speed maintenance periods t4 to t5 can be repeated n times and the additional arrival time periods t3 to t4 and the additional speed maintenance periods t4 to t5 can be alternated with the catchment waiting periods t2 to t3, .

The operation of the dishwasher 1 and the control method according to the present invention will now be described.

The control unit 200 may perform an initial storage step S100 to store wash water when a predetermined time comes. Preferably, a relatively clean wash water may be collected at the end of the rinsing step to collect the sump. The control unit 200 controls the flow path switching motor 321 so that the washing water can flow through the first circulation pipe. Thereafter, the control valve 153 is opened to allow the washing water flowing in the first circulation pipe 31 to flow to the tank 100 through the tank connecting pipe 150.

When the initial waiting period t0 to t1 elapses, the controller 200 drives the motor 47 during the initial pumping period t1 to t2. A part of the washing water discharged from the pump 45 may be stored in the tank 100 and the other part may be sprayed to the tub 10 through the upper arm 21. [ When the initial pumping period t1 to t2 elapses, the control unit 200 stops driving the motor 47 and closes the control valve 153 to prevent the stored wash water from flowing backward. Meanwhile, the washing water injected into the tub 10 in the initial pumping period (t1 to t2) or the initial storage step (S100) needs time to be collected again into the sump. Therefore, the control unit 200 maintains the stop of the pump 45 and the closing of the control valve 153 during the collection waiting period (t2 to t3).

When the catchment waiting period (t2 to t3) and the catching waiting step (S200) are finished, the control unit 200 performs an additional storing step (S300). The control unit 200 drives the motor 47 during the additional pumping period t3 to t5 so that the washing water collected in the sump 60 can flow to the first circulation pipe 31. [ When the regulating valve 153 is opened too early, the stored wash water may flow backward, so that the control unit 200 opens the regulating valve 153 when a predetermined supply rpm is reached or a pre-stored additional arrival time elapses.

When the control valve 153 is opened, the wash water flowing into the first circulation pipe flows into the tank 100, and the wash water is additionally stored. On the other hand, the washing water can be discharged from the upper arm 21 by the motor 47 maintaining the supply rpm. Accordingly, the controller 200 repeats the collecting standby step (S200) and the additional storing step (S300) to additionally store the washing water in the tank (100).

 In the embodiment of the present invention, the initial storage step (S100) is performed for 45 seconds, the catching waiting step (S200), and the additional storing step (S300) is repeated 15 times for 15 seconds. Thus, a storage time of about 120 seconds is required. Through the above operation, the washing water remaining in the tub 10 can be stored in the tank 100 as much as possible, thereby maximizing the recycling amount of the washing water. In addition, when the stored washing water is used in the next stroke, the temperature of the washing water is lowered to room temperature, so that the power consumption is reduced when the washing water is heated. Further, it is possible to increase the storage capacity of the washing water without attaching a separate valve to the circulation pipe 30 or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

For example, the execution time of each step, the time period of each period, and the like may be determined depending on the capacity of the tank 100 and the capability of the motor 47. In addition, the catchment waiting period may be increased depending on the capacity of the sump 60, the tub 10, and the like.

1: Dishwasher 2: Cabinet
3: Door 4: Front cover
5: Lower cover 10:
11: upper rack 13: lower rack
20: washing arm 21: upper arm
23: middle arm 25: lower arm
30: circulation piping 31: first circulation piping
33: second circulation pipe 35: third circulation pipe
41: water supply pipe 45: pump
47: motor 50: filter assembly
60: Sump 71: Drain pipe
100: tank 150: tank connecting piping
153: regulating valve 160: timer
170: memory 180: central processing unit
200: control unit 210: input unit
320: Flow path switching portion 321: Flow path switching motor
323: rotating plate 325a: first switching hole
325b: second switching hole

Claims (14)

A tub forming a space in which the tableware is cleaned;
A sump for collecting wash water sprayed on the tub;
A motor driven to inject wash water supplied to the sump into the turbine;
A circulation pipe through which the wash water supplied from the motor flows;
A tank connected to the circulation pipe to receive and store wash water flowing in the circulation pipe and having a storage space outside the tub;
A control valve for controlling the washing water flowing between the tank and the circulation pipe; And
And a controller for intermittently driving the motor so as to gradually raise the level of the washing water stored in the tank,
Wherein,
Wherein the controller is configured to drive the motor during an initial pumping period when an initial waiting period elapses after opening the regulating valve in an initial state in which there is no wash water stored in the tank,
After said initial pumping period, closing said regulating valve for a collecting waiting period and stopping said motor for said collecting waiting period,
Wherein the controller drives the motor for an additional pumping period after the collecting waiting period and opens the regulating valve for the remainder of the additional pumping period when the RPM of the motor reaches the supply RPM during the additional pumping period. delete delete delete delete delete The method according to claim 1,
Wherein,
Wherein the motor is driven such that the collecting waiting period and the additional pumping period are alternately repeated a plurality of times when the initial pumping period elapses. The method according to claim 1,
Wherein the initial pumping period is longer than the additional pumping period. delete delete A sump for collecting the washing water sprayed on the tub and the tub; a motor driven to spray the washing water supplied to the sump to the tub; a circulation pipe through which the washing water supplied from the motor flows; A control method for a dishwasher including a tank connected to the circulation pipe for storing and storing wash water and having a storage space formed outside the tub, and a control valve controlling the washing water flowing between the tank and the circulation pipe, ,
An initial storage step of driving the motor for an initial pumping period when an initial waiting period elapses after opening the regulating valve in an initial state in which no wash water is stored in the tank;
A collecting waiting step of closing the control valve for the collecting waiting period and for stopping the motor for the collecting waiting period after the initial storing step; And
And an additional storing step of driving the motor for an additional pumping period after the water collecting waiting step and opening the regulating valve for the remaining period of the additional pumping period when the RPM of the motor reaches the supply RPM during the additional pumping period Control method of washing machine. 12. The method of claim 11,
Wherein the collecting standby step and the additional storing step comprise:
Wherein the first and second storage steps are alternately repeated a plurality of times. 12. The method of claim 11,
Wherein the initial pumping period is longer than the additional pumping period. delete

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